Typewriter



Oct. 7, 1941. 5 KHAL'IL 2,258,116

TYPEWRITER Filed June 18, 1938 8 Sheets-Sheet l INVENTOR 6152110 KHALIL.

QLMI M W ATTORN EYS Oct. 7, 1941. s, KHALIL 2,258,116

' 'ITYPEWRITE-R 4 Filed June 18, 1938 s Sheets-Sheet :5

l4 1| 168 ha:

INVENTOR fiz'yz'p KHALIL.

ATTORNEYS S. KHALIL TYPEWRiTER Oct. 7, 1941.

8 Sheets-Sheet 5 Filed Julie 18, 1958 INVENTOR IS'L'YL'D KHALIL.

ATTORNEYS S. KH A LIL TYPEWRITEfi Oct. 7, 1941.

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TYPEWRITER Filed June 18, 1938 8 Sheets-Sheet 7 INVENTOR SEYL'D KHAL11.. V

ATTORNEYS Oct. 7, 1941. s. KHALlL 2,258,116

TYPEWRITER Filed June 18, 1938 8 Sheets-Sheet 8 INVENTOR Slurp KHALIL.

WMM+M ATTORN EYs Patented Oct. 7, 1941 TYPEWRITER Seyed- Khalil, NewYork, N. Y.,"assignor to Remington Rand, Inc., New

poration of Delaware York, N. Y., a cor- Application June 18, ,1938,Serial No. 214,463

12 Claims.

This invention relates to improvements in typewriters and has for aprincipal object the provision of a typewriter having an electricalcarriage return capable of returning the carrlage, to begin a new lineof typing, rapidly and without shock or rebound.

Another object of the invention is the provision in a typewriter of anescapement shaft having a pinion thereon inoperative relation to a rackcarried by the carriage, and the provision of a motor and means forplacing said shaft 'in driven relation to said motor in order to returnsaid carriage, to begin a new line of typing, rapidly and without shockor rebound.

A further object of the invention is the provision in a typewriter of amotor for returning the carriage to begin a new line of typing and of astop control member which disassociates said motor from the typewritercarriage when the left marginal line on the carriage reaches apredetermined point on the frame of the typewriter, and decelerates thecarriage in a zone in which the line is beyond said point, said controlmeans having associated therewith shock-absorbing means for effectingthe deceleration and adapted to urge the carriage out of said zone tobring said line back to said point.

Still another object of the invention is the provision in a typewriterof electrical means for returning the carriage to begin a new line oftyping, a circuit associated with said meansQand a. key for completingand holding said circuit and breaking said circuit and declutching saidmeans at a predetermined point regardless oi whether the key is helddown with the finger or merely depressed and immediately released.vAnother object of the invention is the provision riage return operableafter one or more characters have been struck.

Other objects will be apparent to those skilled in the art.

Typewriters of the prior art provided with electrical means forreturning the carriage produce great shock and operate very noisily ifthe motor is arranged to return the carriage sufiiciently fast, or elsethe speed of the returning I carriage is sacrificed to reduce the shockand 55 relative to the escapement wheel shaft, and other noise.

In machines of the prior art, elaborate means were provided forconnecting the motor drive Patent No. 2,232,114, issued February 18,1941,

is employed to perform the functions described in said application andother functions which will hereinafter be disclosed. I

A key is provided for setting the mechanism into motion to return thecarriage, and this key is efiective in completing and holding the motorcircuit regardless of whether it is depressed and held down, ordepressed and immediately released. This key associates the escapementwheel shaft with the motor, for example by means of a clutch, and at thesame time closes a switch to supply energy to the motor. The switchremains closed and the clutch remains engaged until the typewritercarriage has returned to a point where its left marginal-line is indefinite relation to a fixed point on the frame of the typewriter.

' of a typewriter having electrical means for re- When this point isreached, the motor current is interrupted and theclutch is disengaged,thereby removing the carriage from any further influence by the motor.However, the carriage does not stop at this point, due to the fact thatthe present device does not employ a stationary rigid stop such asisordinarily used in the typewriters oi the prior art.

Instead, the carriage is permitted to move in Y a zone beyond saidpoint, and while so moving in said zone, its momentum is absorbed byshock absorbing means associated with the stop control device. As soonas the momentum is absorbed, the reaction of the shock absorbing meanscauses the carriage to move out of said. zone and back to the positionwhere the left marginal line is in line with said point.

In order to' illustrate the invention, one embodiment, which is merelyby way of example, is illustrated in the drawings, in which Figure 1 isa rear view of a typewriter, according to the invention, showing therelation of the motor and the clutch to the escapement wheel shaft;

Figure 2 is a perspective view showing the relation of the motor, itsreduction gear and clutch thereto an escapement wheel ll.

cooperative parts of the new and improved typewriter;

Figure 3 is a plan view of the motor, the clutch, and other mechanismassociated therewith;

Figure a is a rear elevation of the mechanism shown in Figure 3;

Figure 5 is an elevation of the motor from the gear reduction end,showing the relation of the clutch mechanism and its association withthe carriage-return key;

Figure 6 is a view of some of the mechanism shown in Figure 5 showingthe relation oil the parts in several positions;

Figure '7 is a perspective view of the mechanism shown in Figures 5 and6 showing the relation of such mechanism to the clutch shifter and to aswitch for controlling the how of energy to the motor;

Figures 8, 9, l0 and 11 show progressively the action of the carriagereturn key control rod;

Figure 12 is a sectional elevation taken along the line iZ-iE of Figure4;;

Figure 13 is a plan view of the escapement mechanism, the stop controlmechanism, and associated parts;

Figure 14 is an elevationpartly in section taken along the lines i i-4tof Figure 13;

Figure 15 shows the relation between the escapement wheel and the rigiddog in cases where the carriage is returned with moderate force;

Figure 16 shows the relation between the escapement wheel and the rigiddog in cases where the carriage is returned with extreme force;

Figure 17 is in effect an extension of Figure 2, and shows inperspective the relation of the parts for line spacing and also showsthe electric carriage return key;

Figure 18 is. a plan view of the line spacing mechanism shown in Figure17 with the hand line spacer removed;

Figure 19 is an end elevation of the mechanism shown in Figure 18;

Figure 20 is a plan view of the hand line spacing lever; and

Figure -21 is a sectional view of one form of shock absorber associatedwith the stop control device for absorbing the momentum of the carriage.

The typewriter, Figure 1, has a main frame'30 provided with the usualfeet 3|, and is provided with the usual keys, type bars and space bar(not shown); A carriage 32 is movable on said frame and carries theusual platen 33.

A rack 34 is carried on said carriage, preferably in a horizontal plane,so that it may mesh with a pinion carried on a vertical escapementshaft, which will presently be described.

A spring drum 35 is secured to the frame 30. and a tape 36 carriedthereby is connected to the carriage through the medium of a stud 31carried by the carriage. A sub-frame 38,

mounted on the main frame 30, has the escape-' ment wheel shaft 39pivotally mounted vertically therein. A pinion 40 is keyed or otherwisefixed to the shaft 39 and meshes with the teeth of the end of which isplvotally supported on a pivot member carried in the upright 45, and theother end of which is plvotedin the socket 61. The socket It! isadjustably mounted in the upright it! and when a desired setting isobtained it may be locked in position by means of a lock screw or thelike 68. Although these parts are shown in Figure 1, they can be moreclearly seen in Figure 13.

The dog rocker 35 has pivotaliy mounted thereon a dog 59 which normallyengages a tooth of the escapement wheel ii. The dog it is provided witha tail 5%, the function of which will presently be described. The dogrocker also carries a normally disengaged dog 56 which is mounted on asuitable pivot 52 and operates in the normal way.

The dog rocker 65 is provided with an extension 98 carrying a boss 99which is engaged by a slot B66, formed in the bar lei (see Figure 14).The bar I0! is connected to the universal bar (not shown) of thetypewriter, so that each time the key is depressed the dog rocker ismoved in a clockwise direction on its pivot t6. A screw Hi2 may bearagainst the frame at 563 and may be adjusted to define the limit of themovement of the dog rocker in the counter-clockwise direction,

, as viewed in Figure 14, A similar stop screw may The shaft 39 also hasoperatively connected The relation of these parts may be very clearlyseen in the perspective drawing of Figure' 2. The second sub-frame orbracket 42, secured to the main frame 30, has upright portions 43 and M.A do rocker I5 is provided with a pivotal shaft 46, one

be employed to limit the clockwise movement of the dog rocker. However,in the embodiment herein shown and described, the spring I04 holds theboss 99 against the bottom of the slot H30, and therefore the movementof the universal bar defines the movement of the dog rocker in theclockwise direction as viewed in Figure 14.

A lever 53 mounted on the upright 44 by means of a pivot screw 54carries a cam 55 which acts against the tail 5!! of the normally engageddog when certain functions are to be performed, as will presently bedescribed.

In Figure 2, the dog rocker 45 and its supports have been omitted forthe sake of clarity. However, the relation of the dogs 49 and 5!, andthe relation between the cam and the tail 50 is shown in Figure 2.

The escapement shaft ,39 is provided with a key-way 56, and a clutchmember 51 is provided with a key which engages the key-way 56 so as tomaintain driving relation between the clutch member 51 and the shaft 39.

The shank 58 of the clutch member 51 has formed therein an annulargroove 59 adapted to be engaged by a shifting member, to be presentlydescribed. 1

A rod 60 extending longitudinally of said carriage is supported on thecarriage by means of bell cranks 6| and 62 at either end of thecarriage. The bell crank 6| has a shaft 63 pivotally mounted in theright-hand end of the carriage, asviewed in Figure 1; and the bell crank62 has a shaft pivotally mounted in the lefthand end of the carriage, asviewed inFigure l. The shaft 64 extends through the end of thecarriage'and has secured thereto a thumb lever 65. The thumb-lever 65has an extension 66 which is normally held against a stud 61 in thecarriage frame by means of a spring (not shown).

Referring now to Figures 2, 13 and 14, the rod 60 cooperates with aroller 68 carried on a shouldered shaft 69, and the roller 68 isretained on the shaft by means of a boss 10.

A lever H is pivotally mounted on the subframe "by means of a pivotscrew I2, This lever carries at its upper end a pivot screw 13 to whichis pivoted a bar 14. The lever II is provided with an extension Iadapted to engage the lever 50.

The bar 14 carries on the end opposite the pivoted end, the shaft 69which supports the roller 60, as described. A link" has one endconnected to the bar I4 by means of a pivot cross arm 93 and an engagingmember 04 has screw II, and the other end connected to the frame bymeans of a pivot screw 18. A spring I9 has one end connected to thelever 50 and the other end connected to anarm 80, which extends from theupright 44 for that purpose. When the thumb lever 65, shown in Figure 1,is depressed, the rod 60, through the medium of its bell crank supports,is moved in the direction of the arrows in Figure 2, thereby moving thebar I4 through the medium of the roller 68 and the shaft 69 in thedirection of the arrows shown in Figure 14, thereby moving the lever IIin a clockwise direction as viewed in Figures 2 and 14. This causes thelever 53 to move in such a direction that its cam 55, working againstthe tail 50 of the normally engaged dog 49, removes the engaging end ofthe dog 49 from out of the range of the teeth of the escapement wheel4|, thereby freeing the escapement wheel and permitting the carriage tobe moved freely along the frame in either direction.

The carriage also carries a marginal rack or bar 8| having mountedthereon settable stops 82 and 83. These stops may be clearly seen inFigure 13. The stop 83 defines the left marginal line of the work andalso controls the stopping of the carriage, as will presently bedescribed. The stop 82 controls the right-hand margin of the work, andwhen this stop engages mechanism to be presently described, the keys arelocked against any further strokes unless released by the operator, aswill also be presently described.- j

.The marginal release mechanism is identical with that shown in Figures6 and 7 of co-pending application Serial Number 192,246 and consists ofa composite lever' generally designated by the numeral 8d, and hasitslower element 85 pivotally mounted on the frame, the pivot beingdesignated by the numeral 86. The spring 01 normally servesto hold theupper end of the composite lever lightly against the marginal rack orbar 8i (Figure 14). The upper element 88 is pivotally mounted on thelower member 85 by means of a pivot pin (not shown), so that the upperelement 88 may move pivotally on the lower element'while the latter isfixed. In other words, the composite lever, as a whole,

moves pivotally on the pin 86 in one plane to,

the left as viewed in Figure 14, and the upper element 88 of thecomposite lever moves pivotally on the lower element in a plane at rightangles to'said first plane. The upper end of the element Y 88 isprovided with a round boss 89 which is normally positioned adjacent tothe bar BI so that it may be engaged'by the stop member 82 when thecarriage is moved to the extreme position to the left (which would be tothe right as viewed in Figure 13).

The stop pin 90 in the frame (see Figure 13) serves to define the normalposition of the composite lever 84, and a stop pin 9| serves to limit,tthe inovement of the'upper element 88 on its pivot after the boss 89is engaged by the stop member 82 above described and several charactersare struck.

The upper member 08 also carries an arm 92, which in turn engages a keylocking member 9! which actuates mechanism (not shown) for locking thekey action.

a-hooked end adapted to actuate the composite lever 84 and to move itradially in a counter-clockwise direction, as viewed in Figure 14, so asto bring the round boss 09 out of the path of the stop member 02. Atthis time the element 80 is urged to the rear, as viewed in Figure 14,(which wouldbe to the left as viewed in Figure 13) by means of the leafspring 00. Due to this movement, the arm 92, which is movable therewith,is disengaged from the locking element 91 and thereby the keys areunlocked so that the operator can add several additional letters to theline.

The stop control member, generally designated by the numeral I05, andshown in perspective in Figure 2, has a vertical portion I06 pivotallymounted on the frame by means of a I The upper end I06 pivot pin orscrew I01. of the vertical portion I08 has threaded therein along a lineparallel to the movement'of the carriage a screw I08 which in turncarries on its right end (as viewed in Figure 13) a cartridge I09 whichmay be faced with a disk IIO of vulcanized rubber or any other suitablenonmetallic material.

The settable stop a: is provided with a yoked Thev extension III whichcarries a roller II2. roller I I2 is so positioned that when thecarriage is being returned, the roller engages the disk IIO when theleft marginal line is in line with the printing position of the type.'However, the

engagement of the roller II2 with the disk IN does not cause thecarriage to immediately stop member I I6 so that when the stop controlmember is moved in a counter-clockwise direction, as viewed in Figure 2,the member H6 will resist such motion and will absorb the shock of suchmotion. Further details of the shock-absorbin member will be describedin connection with Figure 21. a

The stop control member I05 also has an arm II8 extending therefrom in adirection parallel to the path of the carriage (toward the left asviewed in Figures 2 and 13) The arm III! has pivotally connectedthereto' a link member H9 by means of a shouldered screw I20, saidpivotal connection being between the upper end of the link H9 and thearm H8. The mechanism associated with the lower end of the link memberII9 will be'presently de-' scribed. When the screw I08 is adjusted toproperly position the disk IIO relative to the roller H2, thisadjustment may be retained by means of a locking screw III. A screw I22in the frame is provided for definingthe normal position of the stopcontrol member 'and serves as a stop for the' movement of the upper endof the portion I06 tothe right, as viewed in Figure 13,

and a set screw I23 is provided for locking the screw I22 after adesired adjustment is obtained.

Referring again to the link member 9, the

lower end of this member, designated by the numeral ass, is made in theform of a yoke which is plvotally connected to an a are by means of apivot screw 52%. The arm 625 is preferably formed integral with e, hub52?, and this hub is supported on the home by meonsof a pivot shaft we.The hub it? hes formed integral therewith an arm Q88 which willpresently be described in connection with the motor control.

The hub 62? else has formed integral therewith en arm a emending in e.general vertical direction. The upper portion its has a slot I253 formedtherein, sud s rod iitwhich extends longitudinally on the cerrisge is atall times positioned in the slot ass. A iever 582, plvotally mounted onthe frame by means oi a pivot screw act, is provided with on extensionEat at 118,119

'mesns of screws M38.

v 2,25o,11o

wheel tooth normally engaged by the dog as may move around to theposition shown dotted as A during which this extra momentum is absorbed.The carriage will then move in an opposition direction to bring its leftmarginal line in line with the printing position and while the carriageis thus moving, said escapement wheel tooth .9? moves from the positionshown dotted, in c direction opposite to that of the arrow, to becomere-engsged by the dog 19, at the time the left marginal line has reachedthe printing position.

An electric motor ass is mounted on a subbese ti t which is in turnsecured to the frame to of the twriter. The sub-base itil has a e 962secured thereto end it strep Edi embrsces the motor and is secured tothe cradle M2 in y suitable manner, for example by The motor shaft I46extends horizontally into the gear housing 665 and cert-less worm gearms. The housing I65 has pivotally mounted therein a vertical shaft is!which carries e. worm gee-.r M8 which meshes with the worm 9%. The shaftI01 extends through the housing M and carries on its upper end a. clutchmember M3. The clutch mem- From this it can be seen that when thecarridge is returned to the point where the roller M2 engages the disk iit, any further movement vof the carriage in the direction it is beingreturned moves the stop control member 55 in a counterclockwisedirection; as viewed in Figure 2, and due to the link its between thearm N8 of the stop control member and the arm I25, the arm are is movedin a clockwise direction, as viewed in Figures 2 and 1d; and due to thismovement the link we moves in the direction of the arrow in Figure Id,thereby pulling the extension I34 of the lever I32 into ermagement withthe lever 53, wlththe result that the cam 55causes the normally engageddog 49 to become disengaged from the escapement wheel teeth. If themomentum of the returning carriage is not unduly great} tooth A of theescapement wheel (see Figure 15) which was normally engaged by the dog49 Just prior to its disengagement, may move 1 to the position A, shownin dotted lines, while the lever 53 moves from its position A to itsposition A, before the momentum of the returning carriage is absorbed.As soon as the momentum arm IIO of the stop control member, re-engagesthe tooth A exactly at the point where the left marginal line comes inline with the printing position of the type.

The cam 55 is so proportioned that even in cases where the carriage, hasextremely great momentum, causing the lever 53 to move even further thanthe position A' shown in Figure 15, the dog 45 will be moved no furtherthan the position shown in dot-dash lines (just out-of the range of theteeth of the escapement wheel H) for example in Figure 1 6; if themomentum of thecarriage were so great that the lever 53 were moved tothe portion A, the dog 45, which is controlled by the cam 55, willassume the posiber ass is keyed to the shaft m and is adapted to beengaged by the clutch member 51 previously described. A platform tdll issupported on the sub-base are immediately above the motor by means ofstuds H56, 85f and MI. A suitable switch I52 is supported on theplatform I with its control plunger its in cooperative relation with ascrew i53 which will presently be described; A standard E55 secured tothe platform E56 by means of screws I56. carries a. pivot screw E51,serving to pivotally support a lever 558. The lever I54 at its left end,as viewed in Figure 4; has secured thereto one'end of a spring I58. Theother end of the spring is secured to a member I59 which may be fixedlysecured to the stud I5! by means of a set screw I50.

A rod IOI pivotally connected to a. key lever I52 (see Figures 4 and 17)by means of a pivot screw I5: is provided for controlling the clutchingof the motor to the escapement wheel shaft and the energlzation of themotor whenever the key I04 is depressed. The lever I62 is pivotallymounted on :1 lug I55 (which may bevformed in-' tegral with the mainframe) by means of a pivot screw I58. A spring I51 is providedforreturning the key lever I52 to its normal position after beingdepressed. When the key Is depressed, the

tlon shown in dot-dash lines, which is the same described.

The gear housing I45 has a portion I15 extending upwardly and carryinglugs I16 and I11. A shaft I10 extends through suitable holes in the lugsI10 and I11 and forms a pivotal support for a yoke I10 (see Figures 3 to11 inclusive),

The yoke I10 carries rollers "land I M which engage the annular groove50 formed in the shank 55 of the movable clutch member 51. The clutchmember 51 is held in its upper normal the lever I83.

. position under the urge of a spring I82 surpresently be described.When the yoke is moved downwardly to engage the clutch member 51 withthe member I48, the cam portion I14 of the lever I18 is engaged by theyoke I 18 and the lever I18 is moved in a counter-clockwise direction,as viewed in Figure gaged by the lower surface of one leg'of the yokeI18. 'I'heother arm.2l4 of the bell crank has a portion 2I4, which undercertain conditions, which will be presently described, acts as '7,thereby causing the screw I53 to engage the y switch control plunger I88and thereby actuate the switch I52.

The lever I54 has an extension I83 pivotally secured to one end thereofby means of a pivot I84. The extension I83 consists of a straightportion I85, a roller portion I88, and a straight end portion I81 havingformed therein a notch or hollow cam surface I88.

The lever I54 has secured thereto a leaf spring 188 by means of screwsI8I and a spacer I82. A buffer I88 is secured to the outer end of thespring I88 and bears against the flat portion I85 of the extension I 83and tends to normally hold the extension in engagement with a lever I83which will presently be described (Figures 3 and 4). For the sake ofclarity, the spring and its mounting are omitted from Figure '7.

A bracket I84 secured to the sub-base I48 by screws I85 carries apivotal support I88 for a lever I81, and a spring I88 having one endsecured to the lever I81 and the other end secured to a pin I88 in thebracket I84, tends normally to hold the lever I81 against the stop pin288; e

A roller 28I carried in the upper end of the lever I81 is adapted to beengaged by the notch or hollow cam surface I88 in the end of the portionI81 oi the extension whenever the lever is actuated due to the movementof the rod I'5I when the carriage return key I84 (Figure 17) isdepressed.

When the above occurs, the roller portion I88 of the extension engagesan extension 282 formed integrally with oneleg of the yoke I18, therebymoving the yoke downwardly, as viewed in Fig-' ures 4 to 8 inclusive, tothe position shown in Figure 9. The limit of movement of the yokedownwardly i s gauged by settable stop screws 288 and 281, and when thedesired adjustment is obtained, these screws are respectively locked bymeans of lock nuts 288 and 288.

Due to this motion of the yoke I19, the clutch member 51 is brought intoengagement with the clutch member I48, and at the same time the otherleg of the yoke acting against the cam surface I14 on the lever I18causes the screw I53 to actuate the switch control plunger I88.

The lever I83 (Figures 3 and '7) is pivotally supported on the side ofthe gear housing I45 by means of a pivot screw 283. Theupper end of thislever, as pointed out above, is normally engaged by the roller I88. Thelower end of a cam against the roller I88.

Referring now to Figure 4, the shaft 2 is journalled in uprights 215,2I8, which may be extensions of the gear housing I45. The shaft 2 hasthe bell crank 2I8 permanently secured thereto, and a pin 2 extendingradially from j the shaft 2 engages a stop pin 2"! in the upright 215. Aspring 2I8 secured to the arm por-- tion 2I2 of the bell crank 2I8serves to hold the pin 2 normally'against the pin 2I8, therebymaintaining the bell crank 2I8 in its normal position.

Assuming that the carriage has advanced during a line vof typing to theend of the line and it is desired to return the carriage to bring theleft marginal line to the printing position, the

key I84, Figure 17, is depressed thereby raising the rod I8I. The memberI58, Figure 7, carried on the rod I8I, acting against the left end ofthe lever I54 causes the same to move in a clockwise direction, asviewed in Figure 7, and thereby causes the. surface of the notch I88 inthe end of the straight portion I81 to move downwardly andengage theroller 28I. As the straight portion I81 moves downwardly, the rollerportion I88 acting against the extension 282 of the yoke I18 causes theyoke'to move downwardly about its pivot-shaft 118..

The yoke I18 in moving downwardly as just described, engages theprojecting cam I14 on the lever I18 and causes the lever to move' in acounter-clockwise direction, as viewed in Figure 7, with the resultthat, the screw I53, acting against the control plunger I88 of theswitch I52,

effects the closure of the switch, thereby completing the motor circuit.a I

At the same time, the yoke, in moving downwardly, brings'the teeth ofthe clutch member 51 into engagement with the teeth of the clutch memberI48 with the result that the motor, via the worm I48, the worm gear I48and the clutch members I48 and 51 rotates the escapement shaft 38 in acounter-clockwise direction, as' viewed in Figures 2 and 3.- Due to thefact that the pinion 48 is meshed with the rack 34 (and it is preferablymeshedatall times) the carriage is rapidly moved in a returningdirection. When the left marginal line, which is determined by thesetting of the marginal stop 83, reaches the printing position, saidstop engages the disk II8 carried at the upper end I88 of the verticalportion I88 of the stop control member I85, causing the stop controlmember to swing in. a counter-clockwise direction as viewed in Figure21, and thereby permits the marginal line to the lever I83 is providedwith a stud 284 carrypass into a zone beyond the printing position in ewhich zone a series of events takes place.

The momentum of the carriage is absorbed due to the fact that the lowerend I88 of the portion I88 acts against the shock absorbing member II8to absorb the momentum of the carriage.

The arm portion II8 of the stop control member I imparts motion totthearm I25 via the link I I8. This motion is thereby imparted to the armI38, see Figures 5, 6 and 1a The arm I38 acting against the roller 285causes the lever 183 to move in a counter-"clockwise direction andtheupper end of this lever acting against the roller I88 swings theextension .I83 of &ver 'I5'4 in a,

clockwise direction, as viewed in Flgure'l, about the pivot screw I84.This causes the cam surface I88 to become disengaged endwise from theroller 28I and the roller I88 then engages the end 2M of the arm 2E4,and causes the roller 2I3, carried engaged, allowing the lever I18 tomove in a clockwise direction as viewed in Figure 7 and therebypermitting the control plunger I88 to move outwardly, whereupon theswitch I52 shuts off the current from the motor.

The successive movements of the roller I86, the yoke I19, the arm 2I4and the roller 2I3, are illustrated in Figures 8, 9, 10 and 11, and inFigure 6, the successive positions of the arm I38 and lever I93, areshown in dotted lines.

If the key I64 has been merely depressed and immediately released, theextension I83 of the pivot screw I84 will return to position the rollerI88 in the normal position shown in Figures 5, 6 and8.

On the other hand, if the key has been depressed and held down untilafter all of the above operations have been completed, the roller I88will return to its normal position after the operator releases the key.

From this it can be seen that regardless of whether the operatordepresses the key and immediately releases it or holds it down, themotor current will be interrupted and the motor will be declutched fromthe escapement wheel shaft by the stop control member when the latter ismoved due to the passing of the left marginal line of the carriage intothe zone described above as beyond the printing position.

The normally engaged dog 49, at the same time the above series of eventsare occurring, is disengaged from the teeth of the escapement wheel 4Idue to the movement of the arm I29 in the direction of the arrow, Figure2, and the imparting of this motion to the tall 58 of the dog 49 via thelink member I35, lever 53 and cam 55.

Also, at the same time, the upper end I29 of the lever I29, through themedium of the slot I38, moves the rod I3I to efiect line spacing as willpresently be described in connection with Figures 17 to 19, inclusive.

As soon as the momentum of the carriage is absorbed the carriage thenbegins to move in the opposite direction, due to the urge of the mainspring in the spring drum 35 which is imparted to the carriage by thetape 33.

'As soon as the carriage starts moving in said opposite direction, thestop control member, due

' to the urge of the resilient member I16, follows up, moving in acounter-clockwise direction, as viewed in Figure 2, and permitting thedog 49 to engage the same tooth of the escapement wheel from which it'was disengaged. at the time the left marginal line of the returningcarriage passed printing position. This insures the accurateregistration of the left marginal line with the printing position due tothe fact that the carriage, in moving from the position in which theshock was absorbed to the printing position, traverses such a shortdistance that its momentum is negligible and there cannot be any reboundof the carriage.

The relation of the dog 49 to the escapement wheel teeth is illustratedin Figures and 16 and has already been described.

Referring now to Figures 17,18 and 19, which illustrate the line spacingmechanism, the rod I9i, previously referred to in the description of theact of returning the carriage, has one end secured to an arm 228 pivotedon the carriage frame by means of a pivot screw 22I and has its otherend secured to the arm 223 of a bell crank 222. The bell crank ispivoted on the carriage frame by means of a pivot screw 224.

The other arm 225 of the bell crank has pivotally connected thereto abar 228 by means of a pivot screw 221.

A lever 228 is pivotally secured to the carriage 32 by means of a pivotscrew 229, and the bar 226 is pivotally connected to the lever 228 bymeans of a shouldered screw 238. A ball-headed screw 231 is threadedinto the .lever 228 and may thereby be set so that the ball 23I mayextend any desired distance from the lever 228 and after the desiredadjustment is obtained then it may be retained by means of a lock nut232.

A shouldered screw 233 carries a line spacing lever 234 similar to theone described in the aforesaid application, Serial No. 192,246, so thatthe operator may effect line spacing independently ries a ratchet member235 similar to the ratchet member in the aforesaid application exceptthat in the present application the. ratchet member 235 is provided witha projecting arm 235 in cooperative relation with the ball 23I of theball headed screw 23!.

In addition to this, the ratchet member also carries a projecting arm231 bearing stop screw 238 which may be locked in any desired setting bymeans of a lock nut 239. The ratchet member also carries a lug 248 whichis pivotally connected to one end of. a twisted bar 2 by means of' apivot screw 242. The other end of the bar 2 is, by means of a pivotscrew 243, connected to a lever 244 which is provided with a hub 245pivoted on a shouldered screw 248. This shouldered screw is secured tothe frame 38 of the carriage.

The hub 245 is embraced by a helical spring 241 which normally tends tomaintain the lever 244 in its normal position, which is the positionshown in Figure 19.

The platen 33 carries the usual ratchet wheel otally connected to thearm 244 by means 01a shouldered screw 255.

When the rod I3I is moved in the direction of the arrow, Figure 2, inthe-manner described in connection with the description of the return ofthe carriage, through the medium of the upper end of the arm I29 and theslot I38, this motion is imparted to the ball 23I through the medium ofthe bell crank 222, the bar 226 and the lever 228, see Figures 17 and18, thereby causing the ratchet member 235 to rotate on the screw 233 tothe position shown in dot-dash lines, Figure 18, whereupon this movementis tranmitted via the twisted bar 2 to the lever 244, and thence via thelink member 253 to the ratchet 249. This advances the platen one or morespaces in accordance with the setting of the plunger 252.

Since this movement of the ratchet 235 is in a counter-clockwisedirection, as viewed in Figures 18 and 20, the notch of the ratchetmoves away from the pawl 256 and therefore the hand line spacing lever23 is not moved about the pivot screw 233.

Referringnow to Figure 21, a modification of the resilient means H6 isillustrated and consists of a helical spring positioned between the yokeIll and the upright H3. Mounted within the spring 251 is a rubber bumper258projecting from the upright H3 and a similar rubber bumper 259extending from the yoke Ill.

The spring 251 is shorter than, the space between the upright H3 and theyoke "I I4 so as to permit the stop control member. I05 to move more orless freely at the beginning of its stroke, and' the bumpers 258 and 259may be provided with heads which engage each other within the spring 251during the latter portion of the stroke of the stop control member I05.Since the bumpers are made of rubber no noise is produced when theyengage each other, thereby lending silence to the operation.

The main faults of the electric return carriage typewriters of the priorart fall in three classes, a brief analysis of which will demonstrate byway of contrast the advantages of my invention as machine is renderedunreliable because the returning carriage may not, in many instances,completely reach the stop position and thereby a crooked left marginalalignment of the typing is produced.

(c) If a decelerating means is installed at a position ahead of thestop, the variable distance through which the carriage returns (as thecarriage may' return distances varying from about one tenth of an inchto many inches) will render such a decelerating device impracticalbecause the capacity of the decelerating means can not be automaticallyvaried to respond to such wide variations of the displacement of thecarriage. Therefore, either the condition described under What isclaimed is:

1. In a typewriting machine having a frame, a carriage-movable alongsaid frame, a rack on said carriage, a motor for returning said carriageto a position to beginfa new line of typing, a circuit for said motorincluding a switch, driving mechanism for. said carriage including apinion meshing with said rack, a clutch between said motor and saiddriving mechanism and including one member movable with respect to theother, a control key, a clutch shifting and switch closing devicecontrolled by said key and adapted'to shift said movable member of theclutch into en agement with said other member and to close said switch,a settable stop. on said carriage, and means controlled thereby fordisassociating said .2. In a typewriting machine having a carriage andincluding aframe along which said carriage moves, a rack carried by saidcarriage, an escapement wheel shaft, a pinion on said shaft meshing withsaid rack, an escapement wheel connected to said shaft and havingescapement dogs in cooperation therewith, an electric motor, clutchmeans for operatively connecting said motor tosaid shaft for returningsaid carriage to begin a new line of typing. a settable finger carriedon said carriage for defining the point at which said line shall begin,a control member pivotally mounted on said frame, linked to said clutchmeans and adapted to be engaged by said finger for disassociating saidmotor from said .shaft,-

and means also linked to and controlled by said member for disengagingone of said do s from said escapement wheel and for maintaining thedisengaged dog out of engagement with said wheel during the entire timesaid finger engages said control member.

3. In a typewriting machine, a frame, a carriage movable along saidframe, a main spring supported on said, frame and connected to saidcarriage, a rack carried by said carriage, ,a shaft carrying a pinionmeshing with said rack, an escapement wheel operatively connected tosaid shaft, dogs cooperating with said escapement wheel to permit saidcarriage to move along said frame in steps as the typing progresses, amotor on said frame, a clutch between said motor and said shaft forplacingsaid carriage in driven relation to said motor, whereby saidcarriage may be moved along said frame in a direction opposite to saidprogressive movement, a circuit for said motor including'a switch, a keyand linkages between said key, the clutch and the switch for en- (a)will occur, or the conditiondescribed under (b) will occur.

It will be seen that all faults or the stop mechanisms for electricreturn carriages are completely eliminated by the present invention inwhich a decelerating means is used beyond the stop position instead ofahead of it.

The structures herein shown and illustrated are devices with the objectof reducing thenoise of the returning carriage to a very low minimum andthese structures permit the carriage to be returned at high speed with aminimum of noise and without shock or rebound.

Although one embodiment of the invention is herein shown and describedby way of example,

it must be understood that the details shown are not intended to belimitative of the invention claims.

gaging said clutch and closing said switch thereby causing said carriageto move in said opposite direction, a settable stop on said carriage, astop control member having a shock-absorbing means associated therewith,said stop control member being adapted to be engaged by said stop whenthe carriage reaches a predetermined point determined by said settablestop, mechanism associated with said stop control member and saidlinkages between said key, said clutch and said switch for disengagingsaid clutch and opening said switch when said stop control member beginsto function, and other linkages connected to said stop control memberfor disassociating one of said dogs from the escapement wheel when saidcarriage reaches said predetermined point, thereby permitting the latterto move beyond said point into a zone in which its momentum is absorbedby said shock absorbing means and to be moved said driving means, a stopcontrol member mounted on said frame, shock-absorbing means associatedwith said member, linkages between said stop control member, said switchand said clutch; a key and mechanism associated therewith including alever cooperating with said linkages for closing said switch andengaging said clutch, a settable finger associated with said carriageadapted to engage said stop control member when said carriage hasreturned to said position,- thereby causing said switch to open, andsaid clutch to be disengaged, whereby said carriage moves'in a zonebeyond said position under its momentum and comes to rest when saidmomentum is absorbed by said shock-absorbing means; and means alsocontrolled by said stop control member for freeing said escapementmechanism during the entire time said carriage is in said zone, wherebysaid main spring urges said carriage from the point where it comes torestto said position.

5. In a typewriting machine, a frame, a car- 'riage movable along saidframe, a rack on said carriage, a shaft; a pinion secured ,to said shaftand meshed with the teeth of said rack, an escapement wheel connected tosaid shaft, escapement dogs in cooperative relation with said wheel, amotor on said frame, mechanism including a clutch for placing saidcarriage in driven relation to said motor, a circuit for said motorincluding a switch, a key having linkages associated therewith forengaging said clutch and closing said switch whereby said motor mayreturn said carriage to a position tobegin a new line of typing; andmeans controlled by, said carriage for disengaging said clutch, openingsaid switch, and disassociating one of said dogs from the escapementwheel when said carriage reaches a predetermined point in its returnmovement.

6. In a typewriting machine, a frame, a carriage, a rack carried on saidcarriage, a shaft journalled on said frame, a pinion on said shaft andnormally maintained in operative relation to said rack, an escapementwheel connected to said shaft, a dog rocker pivotally mounted on saidframe, a dog on said rocker normally in engagement with a tooth of saidwheel, an electric motor, a shaft associated with said motor andpositioned in ndwise relation to said first shaft,

a clutch comprised of a member on each of said shafts, a circuit forsaid motor including a switch,

'a key having mechanism associated therewith cooperating with saidclutch and said switch and adapted to effect the engagement of saidclutchmembers and to close said switch; mechanism partly on saidcarriage and partly on said frame for disengaging said clutch members,opening said switch and disengaging said dog from the escapement wheeland thereby permitting the carriage to move in a zone beyond the pointat which a marginal line on the carriage reaches the printing and springmeans associated with said mechanism adapted to absorb the momentum ofsaid carriage.

7. In a typewriting machine, a frame, a main spring carried on saidframe, a carriage connected to said spring and movable along said frame,an escapement therefor including a shaft geared to said carriage, anescapement wheel connected to said shaft, andidogs in cooperativerelation with said escapement wheel, a settable member on said carriagefor defining the initial starting point of the typing in respect to theprinting position of the type, a stop control device pivotally mountedon said frame and adapted to be engaged by said member from the time thecarriage movesits initial starting point beyond said position until itreturns said point to said position, linkages between said device andone of said dogs in said escapement for disengagin said dog from andfreeing the escapement wheel during the time said point is beyond saidposition, resilient means associated with said device for deceleratingsaid carriage while said point is beyond said position, motor means formoving said carriage in a direction opposite to the direction in whichit moves when the typing is in progress, said motor means including ashaft positioned adjacent to said first shaft, a clutch comprised ofmembers on each of said shafts, and linkages between said device andsaid clutch for disengaging the members of said clutch when said pointfirst reaches said position, said main spring being adapted to move saidcarriage after it has i been decelerated by said resilient means tobring said point from its decelerated position to said printing positionwhere, due to said linkages, said disengaged dog reengages saidescapement wheel.

8. In a typewriting machine, a frame, a carriage, an escapement thereforincluding a shaft geared to said carriage and having an escapement wheelconnected thereto, a dog normally in cooperative relation with saidescapement wheel, a settable stop finger on said carriage for definingthe initial starting point ofthe typing with respect to the printingposition on the type, a stop control device pivotally mounted on saidframe and adapted to be engaged by said finger from the time thecarriage moves its initial startin point beyond said position and untilit returns said point to said position, motor means including a shaftpositioned adjacent to said first shaft, a clutch between said shaftsadapted when engaged to place said first shaft in driven relation tosaid second shaft, a circuit for said motor means including a switch,key controlled means for engaging said clutch and closing said switch,linkages between said device, said clutch and said switch fordisassociating said clutch and for opening said switch during the timesaid point is beyond said position, other linkages between said deviceand said dog for disengaging said dog from the escapement wheel duringthe time said point is beyond said position, and resilient meansassociated with said device for decelerating said carriage while saidpoint is beyond said position.

9. In a typewriting machine, a frame, a main spring on said frame, acarriage connected to said spring and movable along said frame, anescapement rack on said carriage, an escapement shaft on said frame, apinion carried on said shaft and meshing with the teeth of said rack, anescapement wheel connected to said shaft, a dog normally in cooperativerelation with said escapement wheel, motor means on said'frame, keyconposition, when the carriage is being returned; trolled means forassociating said pinionindrivenrelation with said motor means andstarting the latter to operate for returning said carriage to itsinitial position to begin a new line of typing, a settable stop fingeron said carriage defining said initial position, a control memberpivoted on said with said control member for absorbing themomentum ofsaid carriage in said zone, and means controlled by said member fordisassociatlng said pinion from the motor means at the threshold of saidzone and causing the latter to cease operating, said carriage being freeto move under the urge of said main spring from the point at which itsmomentumis absorbed to said initial position due to the'disengagement ofthe dog from the escapement wheel.

10. In a typewriting machine having a carriage and including -a framealong which said carriage moves, a rack carried by said carriage, anescapement wheel shaft, a pinion on said shaft and meshing with-saidrack, an escapement wheel connected to said shaft and having a normallyengaged dog in cooperation therewith, an electric motor, clutch meansfor operatively connecting said motor to said shaft for returning saidcar-- riage to begin a. new line oftyping, a'settable finger on saidcarriage for defining the point at which said line of typing shallbegin, a control member carried on said frame linked to said clutchmeans and adapted to be engaged by said finger for disassociating saidmotor from said shaft when said point is reached by the carriage,

said control member and associated with said dog for disengaging thelatter from the teeth of said escapement wheel and holding it out ofengagement therewith during the time said carriage is moving in saidzone.

11. In a typewriting machine. avframe, a carriage movable along saidframe, a spring drum on said frame and operatively connected to saidcarriage, escapement mechanism carried jointly by said frame and saidcarriage and arranged to normally prevent movement of the carriage underthe force of said spring drum, a motor on said frame, drive mechanismincluding a clutch for operatively connecting said motor to saidcarriage riage movable along said frame, a spring drum on said frame andoperatively connected to said carriage, escapement mechanism carriedjointly said control member beingmovably mounted for by said frame andsaid carriage and arranged to normally prevent movement of the carriageunder the force of said spring drum, power carriage returning mechanism,means for operatively connecting said power carriage returning mechanismto said carriage to move the latter against the force of said springdrum, and means carried jointly by said frame and said carriage fordisconnecting said power carriage returning mechanism from said carriageand rendering said escapement mechanism inoperative when the carriage ismoved to a predetermined position against the force of said spring drum.

SEYED KHALIL.

